Finding the Third Proportional to 128,683.69 and 196,852.78

Step by Step Solution

1. Step 1: Write the proportion equation
   128,683.69 : 196,852.78 = 196,852.78 : x
2. Step 2: Convert to fraction form
   128,683.69/196,852.78 = 196,852.78/x
3. Step 3: Cross multiply
   128,683.69x = 196,852.78 × 196,852.78
4. Step 4: Simplify right side
   128,683.69x = 38,751,017,485.86
5. Step 5: Solve for x
   x = 38,751,017,485.86/128,683.69
6. Step 6: Final answer
   x = 301,133.88